Early age strength enhancement of blended cement systems by CaCl{sub 2} and diethanol-isopropanolamine

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2010.01.008· OSTI ID:21344770

Riding, Kyle ^[1]; Silva, Denise A ^[2]; Scrivener, Karen ^[3]

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1. Department of Civil Engineering, Kansas State University, Manhattan, KS 66506 (United States)
2. W.R. Grace and Co., Cambridge, Massachusetts 02140 (United States)
3. Laboratory of Construction Materials, Ecole Polytechnique Federale de Lausanne, CH-1015 (Switzerland)

The enhancement of the 1 day strength of cementitious systems by a combination of calcium chloride (CaCl{sub 2}) and diethanol-isopropanolamine (DEIPA) was studied, particularly in blended cement systems. A combination of quantitative X-ray diffraction with Rietveld refinement (QXRD), scanning electron microscopy (SEM)/backscattered electron image analysis, thermogravimetric analysis (TGA), and isothermal calorimetry were used to investigate the mechanism of strength enhancement by the additives. The additives were found to increase the early age mortar strength by enhancing the cement hydration, with the DEIPA enhancing primarily the aluminate hydration. DEIPA also affected the morphology of portlandite which was formed as thin plates. In parallel, the calcium-to-silica ratio of the C-S-H was found to increase with the use of DEIPA, possibly because of the inclusion of microcrystalline portlandite. After 48 h DEIPA was found to directly enhance the rate of reaction of granulated blast-furnace slag and fly ash.

• OSTI ID: 21344770
• Journal Information: Cement and Concrete Research, Vol. 40, Issue 6; Other Information: DOI: 10.1016/j.cemconres.2010.01.008; PII: S0008-8846(10)00023-2; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
BLAST FURNACES
CALCIUM CHLORIDES
CALORIMETRY
CEMENTS
FLY ASH
HYDRATION
IMAGE PROCESSING
MICROSTRUCTURE
MORPHOLOGY
MORTARS
SCANNING ELECTRON MICROSCOPY
SILICA
SLAGS
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ASHES
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
COMBUSTION PRODUCTS
DIFFRACTION
ELECTRON MICROSCOPY
FURNACES
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
MATERIALS
MICROSCOPY
MINERALS
OXIDE MINERALS
OXYGEN COMPOUNDS
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
SCATTERING
SOLVATION
THERMAL ANALYSIS
WASTES